Contents I Developer Cheat Sheets (Builder) 11 1 Authentication Cheat Sheet 12 1.1 Introduction. NOSQL INJECTION ATTACKER SQL Attacker Model. Array injection bypasses application layer checks! 11 ATTACK SUMMARY All attacks shown with GET requests also work with POST and PUT requests! Nearly all attacks work on NodeJS, PHP, Ruby and Python in combination with certai n fra meworks! OWASP SQL Injection Prevention Cheat Sheet OWASP Query Parameterization Cheat Sheet Additionally, developers, system administrators, and database administrators can take further steps to minimize attacks or the impact of successful attacks.
Login page #5
- Login page with user name and password verification.
- MD5 Encryption used for password.
- Both user name and password field are prone to code injection.
Credentials for logging in normally
User name | Password |
---|---|
harry | password |
SQL injection.
Executed SQL query when username is harry and password is password:
Sql Injection Cheat Sheet Owasp
SELECT*FROMusersWHEREname='harry'ANDpassword=Owasp Sql Injection Cheat Sheet Github
'5f4dcc3b5aa765d61d8327deb882cf99'When a user enters a user name and password, a SQL query is created and executed to search on the database to verify them. However, the password is not stored as clear text on the database. They are encrypted with MD5 algorithm. The above query searches in the users table where name is harry and password is 5f4dcc3b5aa765d61d8327deb882cf99, which is the MD5 encrypted value of password. If matching entries are found, the user is authenticated.
In order to bypass this security mechanism, SQL code has to be injected on to the input fields. The code has to be injected in such a way that the SQL statement should generate a valid result upon execution. If the executed SQL query has errors in the syntax, it won't fetch a valid result. So filling in random SQL commands and submitting the form will not always result in successful authentication.
Cheat sheet
User name | Password | SQL Query |
---|---|---|
harry | password | SELECT*FROMusersWHEREname='harry'ANDpassword='5f4dcc3b5aa765d61d8327deb882cf99' |
' or '1'='1'# | blah | SELECT*FROMusersWHEREname='OR'1'='1'#' and password='6f1ed002ab5595859014ebf0951522d9' |